Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device. The battery pack comprises a liquid cooling plate, a single battery and an elastic bonding layer, the elastic bonding layer is arranged between the liquid cooling plate and the single battery and comprises an elastic main body part, an elastic compression part and a plurality of adhesive layers; the side, in the third direction, of the elastic main body part is connected with the liquid cooling plate, a groove is formed in the side, away from the liquid cooling plate, of the elastic main body part in the third direction, the elastic compression part is arranged in the groove and connected with the bottom wall of the groove, the elastic compression part comprises a plurality of elastic enclosure walls, and a plurality of glue containing spaces are defined by the elastic enclosure walls and the main body part. At least one shared elastic enclosure bulkhead exists between every two adjacent glue containing spaces, and at least one shared elastic enclosure bulkhead in any two adjacent glue containing spaces is provided with a through hole, so that the two adjacent glue containing spaces are communicated with each other. According to the battery pack, the gluing consistency between the liquid cooling plate and the plurality of single batteries can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery pack and an electrical device. Background Art

[0002] In order to meet the consumers' demands for high endurance, low cost, and high space utilization rate of new energy vehicles, the structure of the battery pack is promoted to transform from a large-module battery pack to a CTP (Cell to Pack, that is, a module-free power battery pack). Compared with the large-module battery pack, the CTP directly integrates multiple single cells into the battery pack. The CTP solution technology reduces some components for fixing single cells, such as end plates and side plates, effectively improving the space utilization rate and energy density of the battery pack. However, at the same time, directly fixing the single cells on the liquid cooling plate is a key problem to be solved by the CTP. At present, the way to fix the single cells on the liquid cooling plate is through bonding with a thermally conductive structural adhesive, but when bonding with the thermally conductive structural adhesive, there is easily a problem of poor consistency in applying glue to the bottom surfaces of multiple single cells. Summary of the Utility Model

[0003] In view of this, the purpose of the present application is to overcome the deficiencies in the prior art and provide a battery pack that can improve the consistency of applying glue between the liquid cooling plate and multiple single cells.

[0004] To achieve the above purpose, the technical solution adopted by the present application is as follows:

[0005] The battery pack according to the first aspect embodiment of the present application has a first direction, a second direction, and a third direction, where the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction respectively. The battery pack includes: a liquid cooling plate, a single cell, and an elastic bonding layer; the elastic bonding layer is provided between the liquid cooling plate and the single cell, and the elastic bonding layer includes an elastic main body portion, an elastic compression portion, and a plurality of adhesive layers; the elastic main body portion is connected to the liquid cooling plate on one side in the third direction, a groove is provided on the side of the elastic main body portion away from the liquid cooling plate in the third direction, the elastic compression portion is provided in the groove and connected to the bottom wall of the groove, the elastic compression portion includes a plurality of elastic enclosing walls, and the plurality of elastic enclosing walls and the main body portion enclose a plurality of glue-containing spaces. At least one common elastic enclosing wall exists between any two adjacent glue-containing spaces, and in any two adjacent glue-containing spaces, at least one common elastic enclosing wall is provided with a through hole to communicate the two adjacent glue-containing spaces; the plurality of adhesive layers are correspondingly provided in the plurality of glue-containing spaces, and the single cell is bonded to the elastic main body portion through the adhesive layer.

[0006] The battery pack of the present application has the following advantages:

[0007] In the above battery pack, a plurality of adhesive layers are correspondingly arranged in a plurality of glue-containing spaces. Thus, when the single battery presses the elastic compression part, the single battery will contact the elastic enclosure wall of the elastic compression part. At the same time, the single battery presses the elastic enclosure wall, and the elastic enclosure wall is compressed until the adhesive layer in the glue-containing space adheres to the single battery, so that one side of the single battery close to the liquid cooling plate along the third direction can be bonded to the elastic main body part through the adhesive layer, so as to fix the single battery on the liquid cooling plate. In this process, since at least one common elastic enclosure wall of any two adjacent glue-containing spaces is provided with a through hole to connect the two glue-containing spaces of the common elastic enclosure wall, when the single battery presses the elastic compression part, the adhesive layer will flow between the plurality of glue-containing spaces, so that the adhesive layer fills the plurality of glue-containing spaces. Thus, the possibility of the adhesive layer overflowing from any one glue-containing space out of the elastic compression part can be reduced. When the adhesive layer overflows from one of the glue-containing spaces, the adhesive layer can overflow into the glue-containing space adjacent to the glue-containing space through the through hole, so as to limit the bonding area between the single battery and the liquid cooling plate, that is, the bonding area between the single battery and the liquid cooling plate is the area of the adhesive layer, thereby improving the consistency of the bonding area of each single battery and the liquid cooling plate, so as to improve the glue application consistency between the liquid cooling plate and the plurality of single batteries.

[0008] According to the battery pack of the first aspect embodiment of the present application, the elastic bonding layer further includes a limiting part. One side of the limiting part in the third direction is connected to the liquid cooling plate, and in the third direction, one side of the single battery close to the liquid cooling plate abuts against the side of the limiting part away from the liquid cooling plate.

[0009] According to the battery pack of the first aspect embodiment of the present application, in the elastic bonding layer, a plurality of the limiting parts are provided, and a plurality of avoiding holes are provided on the elastic compression part. Each avoiding hole is arranged parallel to the first direction, and one of the limiting parts is arranged in each avoiding hole.

[0010] According to the battery pack of the first aspect embodiment of the present application, the elastic compression part further includes a first end and a second end oppositely arranged in the second direction, and at least one of the avoiding holes is provided at each of the first end and the second end.

[0011] According to the battery pack of the first aspect embodiment of the present application, in the first direction, after the elastic main body part is bonded to the single battery and abuts against the limiting part, the size of the elastic main body part is L1 mm, and the size of the limiting part is L2 mm, satisfying: 1 / 2 ≤ L2 / L1 ≤ 1.

[0012] For the battery pack according to the embodiment of the first aspect of the present application, in the elastic adhesive layer, each of the limiting portions is spaced apart from the elastic main body portion, and a plurality of the limiting portions are disposed around the edge of the elastic main body portion and are spaced apart from each other in pairs.

[0013] For the battery pack according to the embodiment of the first aspect of the present application, before the elastic main body portion is bonded to the single battery, the elastic main body portion is in a natural state. After the elastic main body portion is bonded to the single battery and abuts against the limiting portion, the elastic main body portion is compressed. In the third direction, the size of the elastic main body portion in the natural state is L3 mm, the size of the elastic main body portion after being compressed is L4 mm, and the size of the limiting portion is L5 mm, satisfying: 2 ≤ L3 / L5 ≤ 3, and L5 = L4.

[0014] For the battery pack according to the embodiment of the first aspect of the present application, the limiting portion includes at least one limiting sub-portion, and at least one of the limiting sub-portions is stacked along the third direction.

[0015] For the battery pack according to the embodiment of the first aspect of the present application, in the third direction, the projected area of the elastic main body portion on the liquid cooling plate is S1 mm 2 , and the projected area of the single battery on the liquid cooling plate is S2 mm 2 , satisfying: S1 ≤ S2.

[0016] The electrical device according to the embodiment of the second aspect of the present application includes: the battery pack as described above.

[0017] The electrical device of the present application has the following advantages:

[0018] In the above electrical device, since the above battery pack can improve the caulking consistency between the liquid cooling plate and a plurality of single batteries, thus, it can improve the product consistency of the above battery pack, and further make the above electrical device have better product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Shows the structural schematic diagrams of the battery packs of Embodiment 1 and Embodiment 2 of the present application;

[0021] Figure 2Shows an exploded structural schematic diagram of the battery pack according to Embodiment 1 of the present application;

[0022] Figure 3 Shows an exploded structural schematic diagram of the liquid cooling plate and multiple elastic adhesive layers according to Embodiment 1 of the present application;

[0023] Figure 4 Shows a cross-sectional structural schematic diagram of the elastic adhesive layer according to Embodiment 1 of the present application Figure 1 ;

[0024] Figure 5 Shows Figure 4 An enlarged structural schematic diagram of part A in

[0025] Figure 6 Shows a cross-sectional structural schematic diagram of the elastic adhesive layer according to Embodiment 1 of the present application Figure 2 ;

[0026] Figure 7 Shows Figure 6 An enlarged structural schematic diagram of part B in

[0027] Figure 8 Shows a structural schematic diagram of multiple elastic adhesive layers according to Embodiment 1 of the present application;

[0028] Figure 9 Shows a structural schematic diagram of the elastic adhesive layer according to Embodiment 1 of the present application;

[0029] Figure 10 Shows a structural schematic diagram of multiple elastic adhesive layers according to Embodiment 2 of the present application;

[0030] Figure 11 Shows a structural schematic diagram of the limiting part of Embodiment 1 and Embodiment 2 of the present application.

[0031] Main element symbol description:

[0032] 100 - Liquid cooling plate;

[0033] 200 - Single cell;

[0034] 300 - Elastic adhesive layer; 310 - Elastic main body part; 311 - Groove; 320 - Elastic compression part; 321 - Elastic enclosure wall; 322 - Glue-containing space; 323 - Avoidance hole; 324 - First end; 325 - Second end; 330 - Adhesive layer; 340 - Limiting part; 341 - Limiting sub-part. Detailed implementation manners

[0035] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0038] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0040] Refer to Figure 1 、 Figure 2, and Figure 9 As shown in Figure 9 , the battery pack involved in the embodiment of the present application has a first direction x, a second direction y, and a third direction z. The first direction x is perpendicular to the second direction y, and the third direction z is perpendicular to both the first direction x and the second direction y. The battery pack includes: a liquid cooling plate 100, a single battery 200, and an elastic adhesive layer 300.

[0041] Specifically, the elastic adhesive layer 300 is disposed between the liquid cooling plate 100 and the single battery 200. The elastic adhesive layer 300 includes an elastic main body portion 310, an elastic compression portion 320, and a plurality of adhesive layers 330. The elastic main body portion 310 is connected to the liquid cooling plate 100 on one side in the third direction z. A groove 311 is provided on the side of the elastic main body portion 310 away from the liquid cooling plate 100 in the third direction z. The elastic compression portion 320 is disposed in the groove 311 and connected to the bottom wall of the groove 311. The elastic compression portion 320 includes a plurality of elastic enclosing walls 321. The plurality of elastic enclosing walls 321 enclose a plurality of glue-containing spaces 322 with the main body portion. There is at least one shared elastic enclosing wall 321 between any two adjacent glue-containing spaces 322. In any two adjacent glue-containing spaces 322, at least one shared elastic enclosing wall 321 is provided with a through hole to communicate the two adjacent glue-containing spaces 322. The plurality of adhesive layers 330 are correspondingly disposed in the plurality of glue-containing spaces 322. The single battery 200 is bonded to the elastic main body portion 310 through the adhesive layer 330.

[0042] It should be noted that the first direction x is the direction indicated by x in Figure 2 , the second direction y is the direction indicated by y in Figure 2 , and the third direction z is the direction indicated by z in Figure 2 .

[0043] Specifically, in the above embodiment, the adhesive layer 330 is composed of a certain amount of thermally conductive structural adhesive to bond the elastic main body portion 310 and the single battery 200 through the thermally conductive structural adhesive.

[0044] In the above battery pack, a plurality of adhesive layers 330 are correspondingly arranged in a plurality of glue-containing spaces 322. In this way, when the single battery 200 presses the elastic compression part 320, the single battery 200 will contact the elastic surrounding wall 321 of the elastic compression part 320. At the same time, the single battery 200 presses the elastic surrounding wall 321, and the elastic surrounding wall 321 is compressed until the adhesive layer 330 in the glue-containing space 322 adheres to the single battery 200, so that the side of the single battery 200 close to the liquid cooling plate along the third direction z can be bonded to the elastic main body part 310 through the adhesive layer 330 to fix the single battery 200 on the liquid cooling plate 100. In this process, since at least one common elastic surrounding wall 321 of any two adjacent glue-containing spaces 322 is provided with a through hole to connect the two glue-containing spaces 322 of the common elastic surrounding wall 321, when the single battery 200 presses the elastic compression part 320, the adhesive layer 330 will flow between the plurality of glue-containing spaces 322, so that the adhesive layer 330 fills the plurality of glue-containing spaces 322. In this way, the possibility of the adhesive layer 330 overflowing from any one glue-containing space 322 out of the elastic compression part 320 can be reduced. When the adhesive layer 330 overflows from one of the glue-containing spaces 322, the adhesive layer 330 can overflow into the glue-containing space 322 adjacent to this glue-containing space 322 through the through hole, thereby limiting the bonding area between the single battery 200 and the liquid cooling plate 100, that is, the bonding area between the single battery 200 and the liquid cooling plate 100 is the area of the adhesive layer 330, so as to improve the consistency of the bonding area of each single battery 200 with the liquid cooling plate 100 and improve the glue application consistency between the liquid cooling plate 100 and the plurality of single batteries 200.

[0045] Specifically, in some embodiments, the battery pack includes a plurality of single batteries 200 and an elastic bonding layer 300, and each single battery 200 is bonded to the elastic compression part 320 of the elastic bonding layer 300; in some embodiments, the battery pack includes a single battery 200 and a plurality of elastic bonding layers 300, and the single battery 200 is bonded to the elastic compression part 320 of each elastic bonding layer 300; in other embodiments, the battery pack includes a plurality of single batteries 200 and a plurality of elastic bonding layers 300, and each single battery 200 is bonded to the elastic compression part 320 of an elastic bonding layer 300.

[0046] Refer to Figure 3 、 Figure 4 and Figure 6As shown, the battery pack includes a plurality of single cells 200 and a plurality of elastic adhesive layers 300, each single cell 200 is bonded to an elastic compression portion 320 of an elastic adhesive layer 300, the elastic adhesive layer 300 also includes a limiting portion 340, the limiting portion 340 is connected to the liquid cooling plate 100 on one side of the third direction z, and in the third direction z, the side of the single cell 200 close to the liquid cooling plate 100 is bonded to the elastic main body 310 through the adhesive layer 330, and is abutted against the side of the limiting portion 340 away from the liquid cooling plate 100.

[0047] In this embodiment, in the third direction z, since the side of the single cell 200 close to the liquid cooling plate 100 is against the side of the limiting portion 340 away from the liquid cooling plate 100, the distance between the single cell 200 and the liquid cooling plate 100 can be limited by the limiting portion 340, thereby ensuring that the bonding thickness between the liquid cooling plate 100 and each single cell 200 is consistent, thereby further improving the gluing consistency between the liquid cooling plate 100 and multiple single cells 200.

[0048] Example 1

[0049] Reference Figure 3 , Figure 4 as well as Figure 6 As shown, in Example 1, in the elastic adhesive layer 300, a plurality of limiting portions 340 are provided, a plurality of avoidance holes 323 are provided on the elastic compression portion 320, each avoidance hole 323 is arranged parallel to the first direction x, and a limiting portion 340 is provided in each avoidance hole 323.

[0050] In this embodiment, each limiting portion 340 can be accommodated in one of the avoidance holes 323, so that the limiting portion 340 can be limited and fixed by the avoidance holes 323. When the single battery 200 abuts against the limiting portion 340, the limiting portion 340 can be prevented from displacement. At the same time, the installation position of the limiting portion 340 can be limited by the avoidance holes 323 to ensure that each limiting portion 340 is arranged parallel to the first direction x, and further enable multiple limiting portions 340 to contact various locations of the bottom of the single battery 200 along the first direction x, so as to increase the contact area between the limiting portion 340 and the single battery 200, thereby ensuring the consistency of the distance between various locations of the single battery 200 and the liquid cooling plate 100.

[0051] Reference Figure 3 as well as Figure 8 As shown, in Embodiment 1, the elastic compression portion 320 includes a first end 324 and a second end 325 which are arranged opposite to each other in the second direction y, and each of the first end 324 and the second end 325 is provided with at least one avoidance hole 323 .

[0052] In this embodiment, since both the first end 324 and the second end 325 are provided with at least one avoidance hole 323, the first end 324 and the second end 325 can have at least one limiting portion 340, so that the limiting portion 340 provided at the first end 324 and the second end 325 can be offset against the single cell 200 to improve the consistency of the distance between the two ends of the single cell 200 and the liquid cooling plate 100, and further ensure the consistency of the distance between each part of the single cell 200 and the liquid cooling plate 100.

[0053] Specifically, in Example 1, a avoidance hole 323 is provided at the first end 324 and the second end 325, and a limiting portion 340 is provided in each avoidance hole 323. The first end 324 and the second end 325 are provided with a avoidance hole 323, which can not only improve the consistency of the distance between the two ends of the single cell 200 and the liquid cooling plate 100, but also reduce the number of avoidance holes 323, thereby increasing the bonding area between the single cell 200 and the elastic compression portion 320, thereby improving the bonding stability between the single cell 200 and the elastic compression portion 320.

[0054] Specifically, in Example 1, other parts of the elastic compression part 320 except the first end 324 and the second end 325 are also provided with avoidance holes 323. Of course, other parts of the elastic compression part 320 except the first end 324 and the second end 325 may also not have avoidance holes 323.

[0055] Reference Figure 8 As shown, in Example 1, in the first direction x, after the elastic body 310 is bonded to the single battery 200 and abuts against the limiting portion 340, the size of the elastic body 310 is L1mm, and the size of the limiting portion 340 is L2mm, satisfying: 1 / 2≤L2 / L1≤1.

[0056] Specifically, in Example 1, L2 / L1 can be 1 / 2, 2 / 3, 3 / 4, 1, etc.

[0057] In this embodiment, in the first direction x, after the single cell 200 abuts against the limiting portion 340, if the dimension L1 of the elastic main body portion 310 and the dimension L2 of the limiting portion 340 satisfy: L2 / L1 < 1 / 2, the contact area between the limiting portion 340 and the single cell 200 in the first direction x will be too small, resulting in a decrease in the consistency of the distances between various parts of the single cell 200 and the liquid cooling plate 100. If the dimension L1 of the elastic main body portion 310 and the dimension L2 of the limiting portion 340 satisfy: L2 / L1 > 1, the limiting portion 340 will protrude beyond the elastic main body portion 310 in the first direction x, which will increase the distance between any two adjacent elastic main body portions 310, further resulting in an increase in the distance between any two adjacent single cells 200, thereby reducing the space utilization rate of the battery pack and increasing the size of the battery pack. When the dimension L1 of the elastic main body portion 310 and the dimension L2 of the limiting portion 340 satisfy: 1 / 2 ≤ L2 / L1 ≤ 1, the consistency of the distances between various parts of the single cell 200 and the liquid cooling plate 100 can be ensured, and the space utilization rate of the battery pack can also be improved.

[0058] Embodiment 2

[0059] Refer to Figure 10 As shown, in Embodiment 2, the difference from Embodiment 1 is that in the elastic adhesive layer 300, each limiting portion 340 is arranged at intervals with the elastic main body portion 310, and a plurality of limiting portions 340 are arranged around the edge of the elastic main body portion 310 and are spaced apart from each other in pairs.

[0060] In this embodiment, since each limiting portion 340 is arranged at intervals with the elastic main body portion 310, and a plurality of limiting portions 340 are arranged around the edge of the elastic main body portion 310 and are spaced apart from each other in pairs, when the single cell 200 is bonded to the elastic compression portion 320, the edge of the bottom of the single cell 200 can abut against the limiting portion 340 to limit the distances between various parts of the bottom of the single cell 200 and the liquid cooling plate 100 through the limiting portion 340, thereby ensuring the consistency of the distances between various parts of the single cell 200 and the liquid cooling plate 100.

[0061] Refer to Figure 5 And Figure 7 As shown, on the basis of Embodiment 1 and Embodiment 2, before the elastic main body portion 310 is bonded to the single cell 200, the elastic main body portion 310 is in a natural state. After the elastic main body portion 310 is bonded to the single cell 200 and abuts against the limiting portion 340, the elastic main body portion 310 is compressed. In the third direction z, the dimension of the elastic main body portion 310 in the natural state is L3 mm, the dimension of the elastic main body portion 310 after being compressed is L4 mm, and the dimension of the limiting portion 340 is L5 mm, satisfying: 2 ≤ L3 / L5 ≤ 3, L5 = L4.

[0062] Specifically, in this embodiment, L3 / L5 can take values such as 2, 2.4, 2.8, 3, etc.

[0063] In this embodiment, if L3 / L5 < 2, the thickness of the elastic main body portion 310 along the third direction z in the natural state will be too thin, while the thickness of the limiting portion 340 along the third direction z will be too thick. When the single battery 200 squeezes the elastic compression portion 320 to make the adhesive layer 330 in the glue-containing space 322 contact the single battery 200, the squeezing thickness of the single battery 200 on the elastic compression portion 320 will be too thin, resulting in too small a squeezing force of the single battery 200 on the elastic compression portion 320. Further, it will cause that most of the adhesive layer 330 in the glue-containing space 322 cannot contact the single battery 200, leading to an unstable bonding relationship between the single battery 200 and the elastic compression portion 320. If L3 / L5 > 3, the thickness of the elastic main body portion 310 along the third direction z in the natural state will be too thick, while the thickness of the limiting portion 340 along the third direction z will be too thin. When the single battery 200 squeezes the elastic compression portion 320 to make the adhesive layer 330 in the glue-containing space 322 contact the single battery 200, the squeezing thickness of the single battery 200 on the elastic compression portion 320 will be too thick, resulting in too large a squeezing force of the single battery 200 on the elastic compression portion 320. At the same time, there may be a phenomenon that the adhesive layer 330 easily overflows from the glue-containing space 322. When 2 ≤ L3 / L5 ≤ 3, it can not only ensure the stability of the bonding relationship between the single battery 200 and the elastic compression portion 320, but also reduce the possibility of the adhesive overflowing from the glue-containing space 322.

[0064] Refer to Figure 11 As shown, on the basis of Embodiment 1 and Embodiment 2, the limiting portion 340 includes at least one limiting sub-portion 341, and at least one limiting sub-portion 341 is stacked along the third direction z.

[0065] In this embodiment, the distance between the single battery 200 and the liquid cooling plate 100 can be adjusted by the stacking of at least one limiting sub-portion 341 in the third direction z. Further, the squeezing force of the single battery 200 on the elastic compression portion 320 can be adjusted, and the bonding degree between the single battery 200 and the elastic compression portion 320 can be adjusted.

[0066] Refer to Figure 2 As shown, on the basis of Embodiment 1 and Embodiment 2, in the third direction z, the projected area of the elastic main body portion 310 on the liquid cooling plate 100 is S1 mm 2 , and the projected area of the single battery 200 on the liquid cooling plate 100 is S2 mm 2 , satisfying: S1 ≤ S2.

[0067] Specifically, in the first embodiment, S1≦S2 is satisfied; in the second embodiment, S1<S2 is satisfied, so that the limiting portion 340 can abut against the bottom of the single battery 200 .

[0068] In this embodiment, in the third direction z, if the projection area of ​​the elastic body 310 on the liquid cooling plate 100 is S1 mm 2 The projected area of ​​the single battery 200 on the liquid cooling plate 100 is S2 mm 2 If S1>S2 is satisfied, the projected area of ​​the elastic compression part 320 on the liquid cooling plate 100 will be larger than the projected area of ​​the single battery 200 on the liquid cooling plate 100. In this way, when the single battery 200 squeezes the elastic compression part 320, the glue will be squeezed into the edge of the elastic compression part 320, so that there will be excess glue on the periphery of the single battery 200. In this way, the glue will not look good. At the same time, the distance between any two adjacent single batteries 200 will be increased, reducing the space utilization of the battery pack. When the projected area of ​​the elastic main body 310 on the liquid cooling plate 100 is S1mm 2 The projected area of ​​the single battery 200 on the liquid cooling plate 100 is S2 mm 2 When S1≤S2 is satisfied, the adhesive can be located inside the single battery 200, thereby improving the aesthetics of the adhesive application and reducing the distance between any two adjacent single batteries 200, thereby improving the space utilization of the battery pack.

[0069] Specifically, on the basis of Embodiment 1 and Embodiment 2, the projection shape of the elastic main body 310 on the liquid cooling plate 100 is the same as the projection shape of the single cell 200 on the liquid cooling plate 100, so that the bottom of the single cell 200 can be bonded to the elastic compression part 320 through the adhesive layer 330, thereby improving the stability of the bonding relationship between the single cell 200 and the elastic compression part 320, and improving the bonding stability between the single cell 200 and the liquid cooling plate 100.

[0070] The electrical device involved in the embodiment of the present application includes: the above-mentioned battery pack.

[0071] In the above-mentioned electrical device, since the above-mentioned battery pack can improve the glue consistency between the liquid cooling plate 100 and the plurality of single cells 200, the product consistency of the above-mentioned battery pack can be improved, and further the above-mentioned electrical device has better product consistency.

[0072] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction (x), a second direction (y) and a third direction (z), the first direction (x) is perpendicular to the second direction (y), and the third direction (z) is perpendicular to the first direction (x) and the second direction (y), respectively. The battery pack comprises: a liquid cooling plate (100), a single battery (200) and an elastic adhesive layer (300); The elastic bonding layer (300) is provided between the liquid cooling plate (100) and the single battery (200), and the elastic bonding layer (300) comprises an elastic main body portion (310), an elastic compression portion (320) and a plurality of adhesive layers (330); The elastic main body (310) is connected to the liquid cooling plate (100) on one side in the third direction (z), and a groove (311) is provided on the side of the elastic main body (310) away from the liquid cooling plate (100) in the third direction (z). The elastic compression part (320) is arranged in the groove (311) and connected to the bottom wall of the groove (311), the elastic compression part (320) includes a plurality of elastic surrounding walls (321), the plurality of elastic surrounding walls (321) and the main body enclose a plurality of glue containing spaces (322), at least one common elastic surrounding wall (321) exists between two adjacent glue containing spaces (322), and in any two adjacent glue containing spaces (322), at least one common elastic surrounding wall (321) is provided with a through hole, so that the two adjacent glue containing spaces (322) are connected; The plurality of adhesive layers (330) are correspondingly arranged in the plurality of adhesive containing spaces (322), and the single battery (200) and the elastic main body (310) are bonded together via the adhesive layers (330).

2. The battery pack according to claim 1, characterized in that: The elastic adhesive layer (300) further comprises a limiting portion (340), wherein the limiting portion (340) is connected to the liquid cooling plate (100) on one side of the third direction (z), and in the third direction (z), a side of the single battery (200) close to the liquid cooling plate (100) abuts against a side of the limiting portion (340) away from the liquid cooling plate (100).

3. The battery pack according to claim 2, characterized in that: In the elastic adhesive layer (300), a plurality of the limiting portions (340) are provided, a plurality of avoidance holes (323) are provided on the elastic compression portion (320), each of the avoidance holes (323) is arranged parallel to the first direction (x), and a limiting portion (340) is arranged in each of the avoidance holes (323).

4. The battery pack according to claim 3, characterized in that: The elastic compression portion (320) further comprises a first end (324) and a second end (325) which are arranged opposite to each other in the second direction (y), and each of the first end (324) and the second end (325) is provided with at least one avoidance hole (323).

5. The battery pack according to claim 2, characterized in that: In the first direction (x), after the elastic main body (310) is bonded to the single battery (200) and abuts against the limiting portion (340), the size of the elastic main body (310) is L1 mm, and the size of the limiting portion (340) is L2 mm, satisfying: 1 / 2≤L2 / L1≤1.

6. The battery pack according to any one of claims 2 to 5, characterized in that: In the elastic adhesive layer (300), each of the limiting portions (340) is spaced apart from the elastic main body portion (310), and a plurality of the limiting portions (340) are arranged around the edge of the elastic main body portion (310) and spaced apart in pairs.

7. The battery pack according to claim 2, characterized in that: Before the elastic main body (310) is bonded to the single battery (200), the elastic main body (310) is in a natural state. After the elastic main body (310) is bonded to the single battery (200) and abuts against the limiting portion (340), the elastic main body (310) is in compression. In the third direction (z), the size of the elastic main body (310) in the natural state is L3 mm, the size of the elastic main body (310) after being compressed is L4 mm, and the size of the limiting portion (340) is L5 mm, satisfying: 2≤L3 / L5≤3, L5=L4.

8. The battery pack according to claim 2, characterized in that: The limiting portion (340) comprises at least one limiting sub-portion (341), and at least one of the limiting sub-portions (341) is stacked along the third direction (z).

9. The battery pack according to claim 1, characterized in that: In the third direction (z), the projection area of ​​the elastic main body (310) on the liquid cooling plate (100) is S1 mm 2 The projection area of ​​the single battery (200) on the liquid cooling plate (100) is S2 mm 2 , satisfying: S1≤S2.

10. An electrical device, characterized in that: include: A battery pack as claimed in any one of claims 1 to 9.

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